Improved machine foe befitting conical valves



Vgl' PATENTED DEC 1o i867 @uitrit tatss stcnt @frn IMPROVED MACHINE FOR REIITTIN G CONIGAL VALVES;

tite Stimuli maar tir in tigen tttttts rtent :mi mating nut nt tigt anni.

TO. ALL WIIOM IT MAY CONCERN:

Be it known that I, CHARLES F. HALL, of Brooklyn, in the county of Kings, and State ofNew'York, have y invented a new and useful Improvement in Machine for Retting Conical Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the saine, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a device by which the conical stop-valves of gas,l steam, and water-works maybe reitted or repaired when from any cause they are rendered leaky and unfit for use; and the invention consists in providing a milling-tool of such a form that valves may thereby be rendered true and t for service, as willbc herein more fully described.

Figure 1 represents a longitudinal view of the tool, partly in section. Figure 2 is a top or end view of the same. Similar letters of reference indicate corresponding parts.

As the tools for the purpose intended have hitherto been made, the cutting-edges have been formed on the i l interior surface of a hollow cone, the surface of the interior or disk of the cone. being serrated and forming cutting-edges, which radiate from near a common centre and at an angle to a central line which shall correspond with the bevel or angle of ordinary stop or conical valves and seats, so that valves of all the common sizes, from a small to a large diameter, may be operated upon by the same tool.

As regards tbe angles and position of thecutting-edges with regard to the centre, .the tool which I provide does not differ from the above, but instead of Ithe continuous cup or hollow cone, I provide for one or more adjustable and removable cutters on arms or longitudinal sections of a cone which stand at the desired anglo with regard to the central line, as 'shown in the drawing. Thesev cutters may be attached to the arms in any convenient and suitable manner. -v

In this example,of my invention three methods are represented, corresponding in number with the arms on the shaft.

I A represents the shaft. B is the square shank by which the tool is revolved. C represents the centre, which is placed in the shaft on a spiral spring, so that it will yield and adjust itself to the work it has t0 do, as, for instance, to valves of the different sizes or diameters which it niay be necessary to operate upon. D, E, and F represent the arms to which the removable and adjustable cutters are attached. In D the cutter is secured by screws with slotted holes in the cutter. In E the cutter is dove-tailed into the arm, and in F'it is secured in a slot in the a'rm, as seen in the drawing.

I do not confine myself to any-particular number of arms or cutters, nor to any particular inethod of securing or attaching the cutters to the arms; nor do I confine myself to any particular-shaped cutter or cutting-edge, for I am aware that the desired effect may be produced on a conical valve should the cutter or cutters stand in an inclined or in a spiral position, or au oblique longitudinal section ofa cone with curved cutting-edge or edges; neither do I confine myself to removable or adjustable cutters or cutting-edges; but

What I do claim, and desire to secure by Letters Patent, is-

1. A milling-tool, with one or more cutters attached to one or more arms or longitudinal sections of a. cone, (whether straight or oblique,) whereby conical valves oi' different sizes may be retted, constncted substantially as shown and described. i

2. In combination therewith, I claim the yielding centre C, substantially as described.

The above specification of my invention signed by nie, this 5th day of September, 1867.

CHARLES F, HALL.

Witnesses:

WM. F. McNAnARA, ALEX. F. ROBERTS. 

